ICS85320AMILF datasheet(7/16 Pages) IDT

Part #	ICS85320AMILF

Description	LVCMOS/LVTTL-to-Differential 3.3V, 2.5V LVPECL Translator

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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7 / 16 page

REVISION B 12/19/14

85320 DATA SHEET

LVCMOS/LVTTL-TO-DIFFERENTIAL

3.3V, 2.5V LVPECL TRANSLATOR

APPLICATION INFORMATION

The clock layout topology shown below is a typical termination for

LVPECL outputs. The two different layouts mentioned are recom-

mended only as guidelines.

FOUT and nFOUT are low impedance follower outputs that generate

ECL/LVPECL compatible outputs. Therefore, terminating resistors

(DC current path to ground) or current sources must be used for

functionality. These outputs are designed to drive 50Ω transmission

lines. Matched impedance techniques should be used to maximize

operating frequency and minimize signal distortion. Figures 1A

and 1B show two different layouts which are recommended only

as guidelines. Other suitable clock layouts may exist and it would

be recommended that the board designers simulate to guarantee

compatibility across all printed circuit and clock component process

variations.

TERMINATION FOR LVPECL OUTPUTS

FIGURE 1B. LVPECL OUTPUT TERMINATION

FIGURE 1A. LVPECL OUTPUT TERMINATION

ICS85320AMILF Datasheet(PDF) 7 Page - Integrated Device Technology